var events  = require('events');
var emitter = new events.EventEmitter();
emitter.on('say',function(arg1,arg2){
	console.log('listen1',arg1,arg2);
});
emitter.on('say',function(arg1,arg2){
	console.log('listen2',arg1,arg2);
});

emitter.emit('say','hello',' world');